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- (a) When the metallic element lithium combines with the nonmetallic element chlorine, Cl2(g), what is the chemical formula of the product? (b) In the balanced chemical equation for this reaction, what is the coefficient in front of the product if the coefficient in front of Cl2(g) is 1?
문제 17
문제 18a
(a) When a compound containing C, H, and O is completely combusted in air, what reactant besides the hydrocarbon is involved in the reaction?
문제 18b
(b) What products form in this reaction?
문제 18c
(c) What is the sum of the coefficients in the balanced chemical equation for the combustion of one mole of acetone, C3H6O1l2, in air?
문제 19a
Write a balanced chemical equation for the reaction that occurs when (a) Mg(s) reacts with Cl2(g)
문제 19b
Write a balanced chemical equation for the reaction that occurs when (b) barium carbonate decomposes into barium oxide and carbon dioxide gas when heated
문제 19c
Write a balanced chemical equation for the reaction that occurs when (c) the hydrocarbon styrene, C8H81l2, is combusted in air
문제 19d
Write a balanced chemical equation for the reaction that occurs when (d) dimethylether, CH3OCH31g2, is combusted in air.
문제 20b
Write a balanced chemical equation for the reaction that occurs when (a) titanium metal reacts with O21g2
문제 20b,c,d
Write a balanced chemical equation for the reaction that occurs when (b) silver(I) oxide decomposes into silver metal and oxygen gas when heated (c) propanol, C3H7OH(l) burns in air (d) methyl tert-butyl ether, C5H12O(l), burns in air.
문제 21a
Balance the following equations and indicate whether they are combination, decomposition, or combustion reactions: (a) C3H6(s) + O2(g) → CO2(g) + H2O(l)
문제 21b,c,d
Balance the following equations and indicate whether they are combination, decomposition, or combustion reactions: (b) NH4NO3(s) → N2O(g) + H2O(g) (c) Zn(OH)2(s) → ZnO(s) + H2O(l) (d) Ag2O(s) → Ag(s) + O2(g)
문제 22a
Balance the following equations and indicate whether they are combination, decomposition, or combustion reactions: a. PbCO3(s) → PbO(s) + CO2(g)
- Determine the formula weights of each of the following compounds: (a) lead(IV) chloride (b) copper(II) oxide (c) iodic acid, HIO3 (d) sodium perchlorate, NaClO4
문제 23
문제 24e
Determine the formula weights of each of the following compounds: e. benzaldehyde, C6H5CHO, the molecule largely responsible for the odor of almond extract.
문제 25a
Calculate the percentage by mass of oxygen in the following compounds: a. morphine, C17H19NO3
문제 25b
Calculate the percentage by mass of oxygen in the following compounds: b. codeine, C18H21NO3
문제 25c
Calculate the percentage by mass of oxygen in the following compounds: c. cocaine, C17H21NO4
문제 25f
Calculate the percentage by mass of oxygen in the following compounds: f. vancomycin, C66H75Cl2N9O24
문제 26a
Calculate the percentage by mass of the indicated element in the following compounds: a. carbon in acetylene, C2H2, a gas used in welding
문제 26b
Calculate the percentage by mass of the indicated element in the following compounds: b. hydrogen in ascorbic acid, HC6H7O6, also known as vitamin C
문제 26c
Calculate the percentage by mass of the indicated element in the following compounds: c. hydrogen in ammonium sulfate, (NH4)2SO4, a substance used as a nitrogen fertilizer
문제 26d
Calculate the percentage by mass of the indicated element in the following compounds: d. platinum in PtCl2(NH3)2, a chemotherapy agent called cisplatin
문제 26e
Calculate the percentage by mass of the indicated element in the following compounds: e. oxygen in the female sex hormone estradiol, C18H24O2
문제 26f
Calculate the percentage by mass of the indicated element in the following compounds: f. carbon in capsaicin, C18H27NO3, the compound that gives the hot taste to chili peppers.
문제 27
Based on the following structural formulas, calculate the percentage of carbon by mass present in each compound: (a) Benzaldehyde (almond fragrance) (b) Vanillin (vanilla flavor) c) Isopentyl acetate (banana flavor)
문제 28a
Calculate the percentage of carbon by mass in each of the compounds represented by the following models: (a)
문제 29
(a) Write 'true' or 'false' for each statement. (a) A mole of horses contain a mole of horse legs.
문제 29b
(a) Write 'true' or 'false' for each statement. (b) A mole of water has a mass of 18.0 g.
문제 29d
(a) Write 'true' or 'false' for each statement. (d) A mole of NaCl(s) contains 2 moles of ions